Finding the Fourth Proportional to 2,104.35, 3,156.86 and 717.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,104.35 : 3,156.86 = 717.76 : x
2. Step 2: Convert to fraction form
   2,104.35/3,156.86 = 717.76/x
3. Step 3: Cross multiply
   2,104.35x = 3,156.86 × 717.76
4. Step 4: Simplify right side
   2,104.35x = 2,265,867.83
5. Step 5: Solve for x
   x = 2,265,867.83/2,104.35
6. Step 6: Final answer
   x = 1,076.75